摘要
为了定量描述北京城市下垫面的空气动力学特征 ,为模式提供准确的下垫面参数。利用气象塔大气湍流观测资料 ,结合Martano(2 0 0 0 )由单层超声风速、温度资料估算非均匀下垫面空气动力学参数的方法 ,计算了中国科学院大气物理研究所气象塔附近的下垫面空气动力粗糙度z0 和零平面位移d ,即z0 为 1 .75m和d为 40 .1 2m。该结果与前人研究成果的比较结果表明 :最近的 8年内 ,该处的零平面位移和空气动力粗糙度明显增大 。
Quantified understanding of aerodynamic parameters in urban areas is of great importance in the model study. In the context of atmospheric turbulent data from a meteorological tower, Martano's method for estimating aerodynamic parameters by using of single level sonic anemometer data is used. The results indicate that the displacement (d) is 40.12 m and the aerodynamic roughness length ( z 0 ) is 1.75 m over the interested domain within the Beijing urban area. The comparison of these results with other works shows that the displacement and the roughness length have increased obviously in recent eight years, which is coincident to the environment change around this tower.
出处
《应用气象学报》
CSCD
北大核心
2002年第U01期26-33,共8页
Journal of Applied Meteorological Science
基金
<国家重点基础研究发展规划>项目 :首都北京及周边地区大气
水
土环境污染机理与调控原理 (项目编号 :G1 9990 4 5 70 0 )资助
